Here we would like to draw your attention to OPD9 transaction code in SAP. As we know it is being used in the SAP PP-CRP (Capacity Requirements Planning – PP) component which is coming under PP module (Production Planning).OPD9 is a transaction code used for Flow Control Messages in SAP.
It comes under the package CY1C.
Transaction OPD9 technical data table
|Purpose||Flow Control Messages|